Hi all , i am new user to this great forum
and i am a hobby in electronic field , but i have a good skills and i made some nice circuits.
i need help please , what i need is a very simple switch circuit that triggered at only just 3v and that circuit can switch a 12v relay.
i mean when the voltage reches 3 to 4 volts the circuit run and closes the 12v relay.
i know that circuit is easy but i have no information to make it
i think it can be done with transistors or something like that.
:cry: :cry: HELP ME PLEASE